#include<iostream>

int main(){
    using namespace std;
    double * p3 = new double [3];
    p3[0] = 0.2;
    p3[1] = 0.5;
    p3[2] = 0.8;
    cout << "p3[1] is " << p3[1] << ".\n";
    p3 = p3 + 1; // 指针变大,指向下一个地址,说明指针算数有特殊处理
    cout << "Now p3[0] is " << p3[0] << " and ";
    cout << "p3[1] is " << p3[1] << ".\n";
    p3 = p3 -1;
    delete [] p3;
    return 0;
}